When you use EnoFile your data is periodically copied up to our secure server where it's safe. All you have to do is to re-install the app. When you sign in your data is copied back down to your device.
We recommend you try this out for your own peace of mind: When you first register enter a small amount of data -perhaps by adding your winery name (Settings>Profile>My Wineries). Then remove the app and re-install it. Sign in with the same ID you used when you registered and go look for your Winery name. You will see the name you previously entered.